1. Assistant professor and director of the toxicology laboratory, and research specialist/supervisor of the toxicology laboratory, respectively, Section of Toxicology, Department of Pharmacology, Quillen-Dishner College of Medicine, East Tennessee State University, Box 15160A Johnson City, TN 37614-0002, US.
2. Laboratory coordinator and radiation safety officer, Departments of Chemistry and Radiation Safety, East Tennessee State University, Johnson City, TN, US.